Here is the full list of all 59 The Talos Principle 2 achievements. It takes around 40-50 hours to unlock all of the achievements on Windows.
Make a choice that will define the future.
Help Byron get elected mayor.
Activate the tower on the High Plain.
Activate the tower in the Anthropic Hills.
Activate the tower in the Western Delta.
Free Prometheus from his chains.
Activate the tower at the Verdant Canyon.
Solve one Pandora monument.
Activate the tower at the Circular Oasis.
Activate the tower on the Southern Coast.
Activate the tower in the Lost Marshes.
Activate the tower in the Flooded Valley.
Activate the tower on the Desolate Island.
Discover a trace of what happened on the island.
Solve one Prometheus monument.
Enter the Megastructure.
Activate the tower in the Eastern Wetlands.
Read 10 Social Media entries.
Activate the tower at the Wooded Plateau.
Find one Prometheus spark.
Solve "Loop" without doing multiple circles.
Experience a datastream overload.
Activate the tower at the Grasslands Ring.
Return to a puzzle for a second attempt.
Talk to each member of your team.
Build one bridge.
Find an ancient human artifact.
Work on solving a puzzle for more than 20 minutes.
Explore content on a lost terminal.
Embark on the expedition.
Explore the Museum of the Simulation in its entirety.
Visit New Jerusalem's Museum of the Simulation.
Tell Schuyler what to do with his life... or not.
Provide your digital signature to someone.
Finish the calibration process.
Get involved behind the scenes.
Go above and beyond to change the future.
Solve all regular puzzles.
Defy death.
Solve all puzzles and monuments.
Explore New Jerusalem in its entirety.
Explore all of the lost labs.
Solve one Sphinx monument.
Discover a vision of things to come.
Solve "Switcheroo" without using the "keep connections" option.
Solve "Seesaw" puzzle by picking up only one connector.
Activate a Prometheus monument without stopping the spark-chasing music.
Collect all 12 of Trevor's audio logs.
Collect all 12 of Lifthrasir's audio logs.
Use a functioning Somnodrome.
Maintain the status quo in New Jerusalem... for now.
Help Rand get elected mayor.
Have a heated argument with Thecla.
Tell Purple what to do about his voice.
Finish all three text adventures in the exhibition.
Refuse to go along on the expedition.
Read 30 texts on terminals.
Find every manifestation of the past.
Find 10 ancient human artifacts.